Infrared-sensitive electrophotoconductive element comprising an anthanthrone, a phthalocyanine and an oxadiazole compound in admixture

Abstract

An electrophotoconductor is disclosed, comprising a conductive support having provided thereon a photoconductive layer comprising a resin binder having dispersed therein an anthanthrone compound, a phthalocyanine compound, and an oxadiazole compound. The electrophotoconductor exhibits high sensitivity in the wavelength region of from 760 to 850 nm and high negative charge retention and is suitable for use in a recording device using a semiconductor laser as a light source.

What is claimed is: 
     
       1. An electrophotoconductor having high sensitivity in the near infrared region comprising a conductive support having provided thereon a photosensitive layer comprising a resin binder having dispersed therein from 0.5 to 90% by weight of an anthanthrone compound, from 0.5 to 90% by weight of a phthalocyanine compound, and from 0.1 to 90% by weight of an axadiazole compound. 
     
     
       2. An electrophotoconductor as in claim 1, wherein said anthanthrone compound is a compound represented by formula ##STR5## wherein X 1  and X 2  each represents a halogen atom; and n represents 0 or an integer of from 1 to 4. 
     
     
       3. An electrophotoconductor as in claim 1, wherein said oxadiazole compound is a compound represented by formula ##STR6## 
     
     
       4. An electrophotoconductor as in claim 1, wherein said anthanthrone compound is present in an amount of from 10 to 40% by weight based on the resin binder. 
     
     
       5. An electrophotoconductor as in claim 1, wherein said phthalocyanine compound is present in an amount of from 10 to 40% by weight based on the resin binder. 
     
     
       6. An electrophotoconductor as in claim 1, wherein said oxadiazole compound is present in an amount of from 1 to 80% by weight based on the resin binder. 
     
     
       7. An electrophotoconductor as in claim 1, wherein said conductive support is an aluminum sheet having a grain surface and said resin binder is an alkalisoluble resin.